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-rw-r--r--lib/rdoc/parsers/parse_rb.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/parsers/parse_rb.rb b/lib/rdoc/parsers/parse_rb.rb
index baf90577cb..637789992d 100644
--- a/lib/rdoc/parsers/parse_rb.rb
+++ b/lib/rdoc/parsers/parse_rb.rb
@@ -23,6 +23,7 @@ require "rdoc/markup/preprocess"
require "rdoc/parsers/parserfactory"
+$TOKEN_DEBUG ||= nil
#$TOKEN_DEBUG = $DEBUG_RDOC
# Definitions of all tokens involved in the lexical analysis